题目

英语翻译
One kind of TDD looks like a small typewriter.It has rows of buttons.Each button is marked with a letter.Messages are spelled out by pushing the correct buttons.The TDD connects to a telephone through a device called a modem.The modem changes electronic signals from TDD into sounds the telephone can understand.Some TDDs produce messages on paper.Others show them on a television or computer screen.
For example,a deaf girl named Linda wants to call her boy friend,Mark,who is also deaf.First,Linda puts the telephone receiver into the modem.Then she calls Mark’s telephone number by pushing the correct numbered buttons on the telephone.A light on her TDD shows that Mark’s telephone is ringing.
A different light will show if Mark’s telephone is used.Linda will have to wait to call later.If Mark’s telephone is not used,he will see a light going on and off.Then he will know that some one is trying to call him.
46.According to the passage,TDD is ___________.
〔A〕widely u

提问时间：2022-01-12

答案

一种拓展署看起来像一个小打字机.它已排按钮.每个按钮标记的信.邮件所阐明的推动正确的按钮.拓展署连接到电话通过某种装置称为调制解调器.调制解调器的变化,电子信号从拓展署到声音的电话是可以理解的.一些tdds产生...